Refactor ci pipeline.

.gitlab-ci.yml

@@ -87,16 +87,16 @@ test:nglint:
     - npm ng lint
 
 docker-build:
-  image: docker:latest
   stage: package
+  image: docker:latest
   services:
     - docker:dind
+  variables:
+    IMAGE_TAG: "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA"
+  before_script:
+    - docker login -u $CI_DEPLOY_USER -p $CI_DEPLOY_PASSWORD $CI_REGISTRY
+  script:
+    - docker build -t $IMAGE_TAG -f Dockerfile .
+    - docker push $IMAGE_TAG
   only:
     - master
-  before_script:
-    - echo $CI_BUILD_TOKEN | docker login -u "$CI_REGISTRY_USER"
-      --password-stdin $CI_REGISTRY
-  script:
-    - IMAGE_NAME="$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME"
-    - docker build --pull -t "$IMAGE_NAME" -f Dockerfile .
-    - docker push "$IMAGE_NAME"